PIC18F2220-E/SP - 8-Bit 25MHz 4KB Flash MCU | Microchip
MPN: PIC18F2220-E/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.22 | $4.22 |
| 10 | $3.84 | $38.40 |
| 100 | $3.52 | $352.00 |
| 500 | $3.18 | $1,590.00 |
| 1,000 | $2.86 | $2,860.00 |
PIC18F2220-E/SP Overview
A PIC18 microcontroller belongs to the 8-bit microcontroller category, sitting within the broader embedded controller family that includes 16-bit PIC24, 24-bit dsPIC, and 32-bit SAM families. The PIC18 core delivers deterministic single-cycle instruction execution, a C-compiler-friendly architecture with 77 single-word instructions, and upwards code compatibility with PIC16C5X, PIC12CXXX, PIC16CXX, and PIC17CXX devices, giving designers a seamless migration path from legacy code. Peripheral integration and on-chip flash reduce BOM count and PCB footprint for cost-sensitive control loops.
Key features include nanoWatt power-managed sleep modes with typical currents under 1 uA, flexible oscillator options including internal RC, HS crystal, and PLL modes, in-circuit debugging (ICD) capability through dedicated pins, and 100,000 erase/write cycle flash endurance with 40-year data retention. The part also supports parallel slave port operation for external bus expansion on compatible variants. According to the manufacturer datasheet, the ADC reference can be tied to VDD or an external pin, and the comparators feature programmable on-chip reference generators.
Typical applications include consumer appliances, sensor-conditioning front ends, low-end motor control loops, automotive body electronics (when used within its temperature rating), HVAC fan/valve controllers, battery chargers, and home-automation sensor hubs. The integrated ADC and comparators simplify mixed-signal designs that previously required external ADC ICs. Designers migrating from PIC16C/F series benefit from extended instruction set, hardware multiply, and priority-interrupt controller without code rewrites.
When designing with this part, note that the SPDIP package is preferred for hand-prototyping and breadboarding but is less suitable for high-vibration or high-density SMT designs. Brown-out reset voltage is software-configurable between 2.05V and 4.5V, and an LVD module with interrupt is available. Designers should always include a 100 nF decoupling capacitor on VDD, follow Microchip's recommended analog-ground layout practice when using the ADC, and verify that ICD pin assignments are not repurposed on production boards.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18F2220-E/SP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18F2220-E/SP (same form factor and footprint) — differing in Core Architecture, Operating Temperature Range, Package, ADC, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F2220-I/SP
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC18F2320-E/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.59 / Unit
View Datasheet →PIC18F2221-E/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F2220-E/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC, 77 single-word instructions) |
| Program Memory (Flash) | 4 KB (2K x 16) |
| Data Memory (SRAM) | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 25 MHz / 10 MIPS |
| I/O Pins | 25 |
| ADC | 10-bit, 10 channels |
| Analog Comparators | 2 |
| Timers (8/16-bit) | 1 x 8-bit, 3 x 16-bit |
| CCP/PWM Modules | 2 |
| Communication Peripherals | MSSP (SPI / I2C), USART |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Operating Temperature Range | -40C to +125C (Extended "-E") |
| Package | 28-SPDIP (300 mil body, through-hole) |
| ICSP / ICD Support | Yes (2-wire in-circuit serial programming + debug) |
| Brown-Out Reset / LVD | Yes, software configurable |
| Power-Saving Modes | nanoWatt Sleep, Idle, Run |
PIC18F2220-E/SP Pin Configuration
| Pin 1 | MCLR/RE3 — Master Clear (reset) input or digital input RE3 |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input AN0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input AN1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input AN2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input AN3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input / Comparator 1 output |
| Pin 7 | RA5/AN4/C2OUT — PORTA bit 5 / analog input AN4 / Comparator 2 output |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/RA7 — Crystal oscillator input / PORTA bit 7 |
| Pin 10 | OSC2/RA6 — Crystal oscillator output / PORTA bit 6 |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Pin 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Pin 18 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 23 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin 24 | RB3/CCP2 — PORTB bit 3 / CCP2 I/O (alternate) |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5/PGM — PORTB bit 5 / low-voltage ICSP program |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18F2220-E/SP is suitable for 6 applications: Consumer Appliance Control, Sensor Conditioning Front End, Low-End Motor Control (DC / Stepper / BLDC Sensorless), HVAC Fan and Valve Controllers, Battery Chargers and Power Banks, Home Automation Sensor Hubs.
Consumer Appliance Control
The PIC18F2220-E/SP fits consumer appliance controllers (coffee makers, dishwashers, microwave ovens, washing machines) because it integrates 25 I/O pins, a 10-channel 10-bit ADC, two analog comparators, and a 16-bit PWM/CCP module that replace several discrete components. Its nanoWatt sleep mode drops the typical supply current under 1 uA in standby, allowing the appliance to meet strict energy-star standby targets without external RTC chips. The extended industrial -40C to +125C temperature range tolerates the heat of enclosed motor compartments and oven-door switches. Designers typically drive TRIACs or relay coils from the I/O pins while reading temperature and humidity sensors through the ADC.
Recommended
Sensor Conditioning Front End
For sensor signal-conditioning front ends (load cells, thermistors, strain gauges, gas sensors), the PIC18F2220-E/SP combines an on-chip 10-bit ADC with two comparators and a hardware multiplier that simplifies linearization math in firmware. The integrated MSSP peripheral handles SPI or I2C communication with downstream MCUs and digital sensors, eliminating an external transceiver. The 4 KB flash holds complete sensor-linearization lookup tables, and the 256-byte EEPROM stores calibration constants that survive power cycles. With a 25 MHz clock, the 10 MIPS throughput comfortably runs 100 Hz sampling loops for industrial weighing scales and HVAC pressure transmitters.
Recommended
Low-End Motor Control (DC / Stepper / BLDC Sensorless)
The PIC18F2220-E/SP can drive small DC, stepper, and sensored BLDC motors in low-power applications such as fans, pumps, and small appliances. Its two CCP/PWM modules generate complementary PWM with dead-band control in firmware, while the 16-bit timers capture back-EMF for sensorless BLDC startup. The 10-bit ADC monitors current via shunt resistors and closes a torque loop at 10 kHz. Although not a dedicated motor-control DSP, the 10 MIPS throughput is sufficient for sub-100 W motor drives; for higher performance designers migrate to the dsPIC33FJ128MC510A-E/PT digital-signal-controller family.
Recommended
HVAC Fan and Valve Controllers
In HVAC blower fans, damper actuators, and zone valves, the PIC18F2220-E/SP's extended -40C to +125C temperature grade tolerates attic and rooftop equipment enclosures that exceed standard industrial limits. The PIC18 core's deterministic interrupt latency keeps the closed-loop fan-speed controller responsive under 100 us. Two analog comparators handle over-current and zero-cross detection, while the MSSP peripheral talks to digital temperature/humidity sensors on a shared I2C bus. Sleep currents under 1 uA let the board be powered from a small transformer wall-pack without active cooling.
Recommended
Battery Chargers and Power Banks
The PIC18F2220-E/SP works well in single-cell Li-ion and lead-acid charger controllers where its 10-bit ADC measures battery voltage, charge current, and NTC thermistor temperature in parallel through AN0-AN9. The MSSP peripheral can drive an I2C OLED status display, and the PWM module regulates the synchronous buck or flyback converter. Brown-out reset at 2.0 V prevents deep-discharge damage on depleted batteries. The 256-byte EEPROM stores charge-profile parameters such as CV/CC setpoints and end-of-charge termination thresholds.
Recommended
Home Automation Sensor Hubs
The PIC18F2220-E/SP forms the central controller of home-automation sensor hubs that aggregate temperature, motion, door, and air-quality data. The PIC18's USART interfaces with a wireless module such as a sub-GHz transceiver or BLE bridge, and the MSSP talks to I2C sensors on a shared bus. The 25 MHz core runs Modbus RTU or a light-weight Zigbee coordinator stack, while the 4 KB flash accommodates a complete firmware image. The SPDIP package simplifies DIY and open-source home-automation builds that require hand-soldered boards.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F2220-E/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F2220-I/SP | PIC18F2320-E/SP | PIC18F2221-E/SP |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Program Flash | 4 KB | 4 KB | 8 KB (+100%) | 4 KB |
| SRAM | 512 bytes | 512 bytes | 512 bytes | 256 bytes (-50%) |
| Maximum Clock | 25 MHz / 10 MIPS | 25 MHz / 10 MIPS | 25 MHz / 10 MIPS | 25 MHz / 10 MIPS |
| Temperature Range | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) |
| I/O Pins | 25 | 25 | 25 | 25 |
| ADC | 10-bit / 10 ch | 10-bit / 10 ch | 10-bit / 10 ch | 10-bit / 10 ch |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
Key Differentiators
- Extended industrial -40C to +125C temperature grade in 28-SPDIP (vs PIC18F2220-I/SP)
- Drop-in upgrade path with double flash density (vs PIC18F2320-E/SP)
- Integrated MSSP supporting both SPI and I2C master/slave (vs PIC18F2221-E/SP)
Design Notes
The PIC18F2220-E/SP draws less than 1 uA in Sleep mode according to the Microchip datasheet, but only when the watchdog timer, ADC, comparators, and brown-out reset are all disabled. Estimated: leaving the BOR enabled raises Sleep current to roughly 20 uA and watchdog-enabled Sleep to roughly 7 uA. For battery-powered designs, gate the analog peripherals through firmware before issuing the Sleep instruction and verify actual current with a uA-capable multimeter.
Place a 100 nF decoupling capacitor within 5 mm of the VDD pin (pin 20) and a 10 uF bulk capacitor near the IC for analog-supply stability. Estimated: this layout reduces ADC noise by approximately 6 dB and prevents PORTA digital outputs from injecting switching noise into AN0-AN3. For best ADC accuracy, route AVCC (when present on a sibling pin) to VDD with a ferrite bead and provide a separate analog ground return.
Oscillator traces (OSC1/OSC2) should be as short as possible and guarded by a ground ring to reduce radiated emissions. The ICSP pins PGC (RB6) and PGD (RB7) are used for in-circuit debugging and must not be re-purposed on production boards without a dedicated programming connector. Estimated: extending ICSP traces beyond 50 mm risks programming failures; place a 4.7 kohm pull-up on MCLR (pin 1) to guarantee proper reset during programming.
A common mistake is leaving analog pins configured as analog at startup, which forces the digital input buffer to consume parasitic current and increases ADC cross-talk. According to the Microchip datasheet, AN0-AN12 must be reconfigured as digital I/O via the ANSEL/ANSELH registers immediately after Reset. Estimated: failure to do this can add 5-20 uA of phantom current draw and degrade ADC accuracy by 1-2 LSB on adjacent channels.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; the -E suffix denotes extended industrial temperature grade (-40C to +125C), NOT automotive qualification. For AEC-Q100 automotive designs use PIC18F-K40 or PIC18F-Q41 series.
